[Openstack-stable-maint] Stable check of openstack/oslo.messaging for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/00c9aa23e83843fda6d70c2d423a90... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f76e3f8f24bf4cbeb2d74739b4c5e4f8 : SUCCESS in 4m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/56362ad7013d4ddd9bcb57cc69ccc9bd : SUCCESS in 5m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/81cf58df98dd4f30b07ad1784a3a96f4 : SUCCESS in 5m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c0a2fa05a7db411daba5fb75876e2a72 : FAILURE in 4m 52s